Hepatitis B surface antigen test
Sreelekha DaruvariLast Updated on 19th January 2022Table of contents
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What is the HBsAg test used for?
The HBsAg test is used to diagnose hepatitis B infection. HBsAg is the primary antigen that can be detected following HBV infection. The surface antigen can be detected about 1-9 weeks after the emergence of clinical symptoms. HBsAg test is also used as a screening test before surgery and during pregnancy to ensure that a newborn from a hepatitis B virus mother can receive prophylactic treatment measures. Additionally, HBsAg test monitors and evaluates patients with an active HBV infection.
What is included in the HBsAg test?
The HbsAg test detects the presence of HbsAg in the blood. Additionally, the test measures the amount of HBsAg in blood.
Procedure for the HBsAg test
The HbsAg test is like other routinely performed blood tests.
- A trained phlebotomist will draw a small amount of blood by inserting the needle into the vein.
- The collected blood sample will be transferred to a small vial or test tube. The sample will then be sent to a partner lab for further processing.
- Slight pain may be experienced in the arm when the needle is inserted into the vein. However, the pain will fade off quickly. Some individuals may also experience redness and swelling at the needle insertion site.
- The procedure usually lasts for about 5-10 minutes.
How to prepare for the HBsAg test?
No special preparations are needed for a HbsAg test. Some biotin supplements (also known as Multi-vitamins, coenzyme R, Vitamin B7) can interfere with the HbsAg test results. Discuss the medications you are currently taking with your healthcare provider before the test.
Things to consider after the HBsAg test is complete.
No special considerations or precautions are needed once the test is complete. Check for the test status on the MFine mobile app or website. Once the results are available, download the report and discuss it with your doctor. The doctor may recommend additional tests or starting medications based on the results of your HBsAg test.
What types of infection can the HBsAg test detect?
The HBsAg test is used to detect hepatitis B infection.
How much does the HBsAg test cost?
The cost of an HBsAg test varies across different cities in India. The starting price of the test ranges between 128 and 1105 rupees.
*Disclaimer: The value varies based on location, time, and your preferred lab partner.
How long does it take to get the results for the HBsAg test?
You can expect to get the results for the HBsAg test within 24 to 48 hours after the sample is collected. However, in certain cases, depending on the location, medical advice, and preferred lab partner, it may take longer.
What do abnormal HBsAg test results indicate?
A positive result for the HBsAg test indicates that you are infected with hepatitis B and can transmit the infection to other individuals. However, the HBsAg test does not differentiate between an acute and chronic hepatitis B infection. The HBsAg is used together with other hepatitis B blood tests like hepatitis B surface antibody (HBsAb) and hepatitis B core antibody (HBcAb) tests to determine the accurate clinical status of hepatitis B infection.
Disclaimer: Please consult with your doctor to interpret the test reports.
Is the HBsAg test a definitive test?
Yes, the HBsAg test is a definitive test for diagnosing hepatitis B infection. However, your healthcare provider may recommend additional blood tests to determine if the infection is acute or chronic. The doctor may also recommend liver function tests and sometimes a liver biopsy test to assess the extent of liver injury.
How to read the HBsAg test report?
A positive result indicates that you have hepatitis B infection, and you can transmit the infection to other individuals. A negative result may indicate that you are not infected with the hepatitis B virus. However, your healthcare provider will recommend further tests for confirmation. Always interpret your test result in consultation with your healthcare provider.
Why book an HBsAg test?
- To screen or monitor patients with suspected hepatitis B viral infection.
- To monitor and evaluate individuals receiving treatment for hepatitis B infection.
- To screen pregnant individuals, who are blood or organ donors, and who require immunosuppressive therapy.
HBsAg test at home – how does it work?
The HBsAg test is just like any other blood test. A trained phlebotomist visits your home when you book your tests through the MFine app. The Phlebotomist first cleans the arm and then inserts a syringe into a vein. The required amount of blood is then taken into a vial. The Phlebotomist then removes the needle and places cotton wool or a bandage over the prick.
Are there any risks involved with the HBsAg test?
The HBsAg test is devoid of any serious risks and injuries. Like other routinely performed blood tests, some individuals may experience pain, swelling, and redness at the site of needle insertion.
What can affect the results of the HBsAg test?
Biotin supplements may interfere with the HBsAg test results. Before HBsAg testing, disclose all the medications and supplements you are talking to your healthcare provider. The presence of food or fasting does not affect the results.
For further assistance
Frequently asked questions | FAQs
Is the lab technician coming for the HBsAg test sample collection vaccinated?
Yes. Our phlebotomists are fully vaccinated. Further, they also ensure safety throughout by wearing a mask, gloves and frequently sanitizing themselves during the sample collection.
Does MFine provide the interpretation for the results along with the reports?
Yes, MFine provides the interpretation for the result along with the reports. You can also avail a free medical consultation with a doctor to understand your reports accurately. The doctor will also advise and prescribe medicines, if required, based on the results.
How can I download my HBsAg test report?
- Login to MFine
- Go to your profile
- Click on Attachment and Reports
- Click on Lab Report
- Download the report
Are there any discount offers running on the HBsAg test?
Usually, you can avail of up to 50% discount on the HBsAg test through MFine. However, the discount and test price may vary based on lab partner and location.
What are the symptoms of hepatitis B infection?
Some symptoms of hepatitis B infection include-
- Fever
- Nausea or vomiting
- Fatigue
- Loss of appetite
- Abdominal pain
- Dark urine
- Joint pain
- Yellowing of sclera (white part of the eye)
- Jaundice (a condition characterized by yellowing of the skin).
How does hepatitis B transmission take place?
Hepatitis B transmission occurs through sexual contact, sharing of infected needles, the transmission from mother to child, accidental needle sticks, among others.
Sexual contact– Transmission occurs when the blood, semen, saliva, or vaginal secretions infected with the virus enter an uninfected individual.
Sharing of infected needles or syringes– Sharing syringes or needles contaminated with the hepatitis B virus results in its transmission.
Mother-to-child transmission– A mother infected with the hepatitis B virus can pass it to the developing baby.
Contact with blood of an infected person – like in Blood transfusions.
What are the other diagnostic tests available for screening hepatitis B infection?
A combination of blood tests, a liver ultrasound test, and a liver biopsy test are used for assessing hepatitis B infection.
- Blood tests– Blood tests are generally used to screen for hepatitis B infection and determine if a person has developed immunity post-infection or vaccination. Following blood tests are available for screening hepatitis B infection apart from HBsAg test-
- i) Hepatitis B surface antibody (HBsAb) or anti-HBs test: This test detects if antibodies have developed against HBsAg. A positive result in this test indicates a person has developed protective antibodies against the hepatitis B virus, either due to past infection or following vaccination. The person is immune against hepatitis B infection and thus cannot transmit the infection.
- ii) Hepatitis B core antibody (HBcAb) or anti-HBc test: HBcAb test evaluates the presence of antibodies developed against the hepatitis B core antigen. This antibody does not confer protection against the virus, and the result of this test is always interpreted along with results from HBsAg and HBsAb tests.
iii) Immunoglobulin M (IgM) hepatitis B core antibody (IgM anti-HBc): IgM anti-HBc detects only the presence of IgM antibodies against Hepatitis B core antigen. This test is used in conjunction with results from other hepatitis B screening tests for interpreting the clinical status of hepatitis B infection.
- iv) Hepatitis B e antigen (HBeAg): This test detects the presence of hepatitis B e antigen in the blood. HBeAg is a protein produced by the virus during its replication. A positive result in the HBeAg test indicates that an individual has an active hepatitis B infection and can spread the infection to others.
- v) Hepatitis B e antibody (anti-HBe): This test detects the presence of antibodies against HBeAg. The appearance of anti-HBe and the disappearance of HBeAg indicate clinical improvement.
- vi) Hepatitis B viral DNA: This test detects the presence of viral genetic material in the blood. A positive result indicates active replication of viral in an individual. The test is commonly used to examine the efficaciousness of the antiviral treatment.
- Liver ultrasound test– An ultrasound of the liver evaluates the extent of liver damage caused due to hepatitis B infection.
- Liver biopsy– A small amount of liver tissue is removed to determine the extent of liver injury.
Your healthcare provider may also recommend liver function tests that measure the number of various liver enzymes to determine the clinical status of hepatitis B infection.
Who are the people at risk of getting hepatitis B infection?
The following groups of people are at an increased risk of getting hepatitis B infection-
- Individuals with multiple sex partners
- Healthcare workers
- Baby born to an infected mother
- Individuals who share syringes or needles
- Patients on hemodialysis
How is hepatitis B infection prevented or treated?
You can prevent Hepatitis B infection by taking the hepatitis B vaccine.
Treatment for acute hepatitis B infection
In most cases, if the infection is acute (short-lived), it will subside on its own, and no specific treatment is required in most of the cases. Your healthcare provider may treat you based on your symptoms.
Treatment for chronic hepatitis B infection
Individuals with chronic infection may require treatment for their entire duration of time. Treatment includes the use of antiviral drugs like entecavir, tenofovir, etc., and interferon injections. Your healthcare provider will recommend the drugs based on your clinical status. For individuals who have a damaged liver, liver transplantation may be suggested. You can replace your damaged liver with a healthier liver from a deceased donor or healthier donors (these individuals donate a small portion of their liver).
Can a pregnant woman infected with hepatitis B infection ensure her baby does not get hepatitis B infection?
Yes! Hepatitis B infection can be prevented in newborns by a combination of hepatitis B immune globulin (HBIG) and hepatitis B vaccine. These shots must be administered at appropriate time intervals. Follow the recommendations of your healthcare provider.
Disclaimer: The content is uniquely informative and is meant for educational use. Kindly use the content only in consultation with an appropriate certified or registered healthcare provider.